/Engine/Source/Developer/AnimationDataController/Public/AnimDataController.h
Sets a single key for the transform curve with provided identifier. Broadcasts a EAnimDataModelNotifyType::CurveChanged notify if successful. In case a key for any of the individual transform channel curves already exists the value is replaced.
Whether or not the transform curve key was successfully set
virtual bool SetTransformCurveKey ( const [FAnimationCurveIdentifier](API\Runtime\Engine\Animation\AnimData\FAnimationCurveIdentifier) & CurveId, float Time, const FTransform & Value, bool bShouldTransact )